ALEXANDRIA, Va., March 12 -- United States Patent no. 12,247,790, issued on March 11, was assigned to PANASONIC HOLDINGS Corp. (Osaka, Japan).
"Heat storage device" was invented by Ryuichi Ozaki (Osaka, Japan) and Tatsuya Nakamura (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A heat storage device of the present disclosure includes a latent heat storage material and a container. The latent heat storage material is water-soluble. The container houses the latent heat storage material and is formed of a main material being aluminum or an aluminum alloy. The container has a joining portion and a first coating. The first coating covers at least the joining portion on an inner surface of the contain...